CN114531200B - Radio frequency signal dynamic coverage system and method using wireless laser communication as carrier - Google Patents
Radio frequency signal dynamic coverage system and method using wireless laser communication as carrier Download PDFInfo
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- CN114531200B CN114531200B CN202210426552.3A CN202210426552A CN114531200B CN 114531200 B CN114531200 B CN 114531200B CN 202210426552 A CN202210426552 A CN 202210426552A CN 114531200 B CN114531200 B CN 114531200B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/112—Line-of-sight transmission over an extended range
- H04B10/1129—Arrangements for outdoor wireless networking of information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a radio frequency signal dynamic coverage system and a method using wireless laser communication as a carrier, which at least comprise a base station, movable access points and a terminal user, wherein the base station modulates radio frequency signals on wireless laser signals and sends the wireless laser signals to one or more movable access points, and the movable access points freely move in a certain range; after receiving the wireless laser signal, the movable access point converts the wireless laser signal into a wireless radio frequency signal and sends the wireless radio frequency signal to a terminal user; the base station and the movable access point are provided with positioning and tracking subsystems to realize bidirectional wireless laser communication; the movable access point dynamically adjusts the position of the movable access point and the output radio frequency wave beam according to the number and the position of the terminal users, so as to realize the dynamic coverage of the radio frequency signals; the invention takes the wireless laser communication as a carrier, breaks away from the constraint of the traditional optical fiber communication, enables the radio frequency coverage area to be dynamically adjusted, and expands the coverage area of the system and improves the flexibility of the system while keeping the high speed and the high bandwidth of the optical carrier radio frequency system.
Description
Technical Field
The invention belongs to the technical field of wireless communication, particularly belongs to a wireless laser communication technology and a radio frequency wireless communication technology, and relates to a radio frequency signal dynamic coverage system and a radio frequency signal dynamic coverage method taking wireless laser communication as a carrier.
Background
The traditional optical-carrier radio frequency technology combines the advantages of large bandwidth of light and the flexibility of radio frequency wireless access, has the advantages of small volume, light weight, small loss, electromagnetic interference resistance, high transmission quality and the like, and can solve the problems of large loss, weak interference resistance and the like of the traditional microwave transmission system. However, the conventional radio over fiber technology transmits signals based on optical fibers, the position of an optical link of the radio over fiber technology is relatively fixed and cannot be dynamically adjusted, and the coverage area of the radio frequency signals must be designed based on the routing of the optical fibers, so that the coverage area and the degree of freedom of the radio frequency are limited.
With the development of communication technology, the capacity, rate and stability of short-distance wireless laser communication have gradually approached that of optical fiber communication. Meanwhile, the optical mobile communication technology utilizes the modes of beam tracking and the like on the basis of wireless laser communication to enable the communication to support mobile users, so how to reasonably and effectively combine the application of the wireless laser communication technology and the radio frequency wireless technology becomes a new development direction.
Disclosure of Invention
The invention provides a radio frequency signal dynamic coverage system and a method using wireless laser communication as a carrier, aiming at the problem that the radio frequency coverage range and the degree of freedom are limited in the prior art, the system at least comprises a base station, a movable access point and a terminal user, wherein the base station modulates radio frequency signals on the wireless laser signals and sends the radio frequency signals to one or more movable access points, and the movable access points can freely move within a certain range; after receiving the wireless laser signal, the movable access point converts the wireless laser signal into a wireless radio frequency signal and sends the wireless radio frequency signal to a terminal user; the base station and the movable access point are provided with positioning and tracking subsystems to realize bidirectional wireless laser communication; the system and the method take wireless laser communication as a carrier, and are free from the constraint of the traditional optical fiber communication, so that the radio frequency coverage area can be dynamically adjusted, the high speed and the high bandwidth of the radio frequency over optical fiber system are kept, the coverage range of the system is expanded, and the flexibility of the system is improved.
In order to achieve the purpose, the invention adopts the technical scheme that: the radio frequency signal dynamic covering system using wireless laser communication as carrier at least includes base station, movable access point and terminal user,
a base station modulates a radio frequency signal on a wireless laser signal and sends the wireless laser signal to one or more movable access points, and the movable access points can move freely within a certain range;
after receiving the wireless laser signal, the movable access point converts the wireless laser signal into a wireless radio frequency signal and sends the wireless radio frequency signal to a terminal user;
the base station and the movable access point are respectively provided with a positioning and tracking subsystem, and the positioning and tracking subsystems comprise a positioning signal transmitter, a light beam deflection module, a positioning signal processing module, a feedback signal receiver, a positioning signal processing module and a feedback signal transmitter, so that bidirectional wireless laser communication is realized; the movable access point can dynamically adjust the position of the movable access point and the output radio frequency wave beam according to the number and the position of the terminal users, and dynamic coverage of radio frequency signals is achieved.
In order to achieve the purpose, the invention also adopts the technical scheme that: the radio frequency signal dynamic covering method using wireless laser communication as a carrier comprises the following steps:
s1, the base station broadcasts a positioning signal to the free space, the movable access point sends a feedback signal to the base station along the incoming wave direction after receiving the positioning signal, and the base station determines the position of the movable access point and the current state of each access point according to the received feedback signal;
s2, the base station modulates the radio frequency signal on the signal through the optical signal processing module and transmits the signal to the movable access point in the working state through the laser source; meanwhile, the base station continuously transmits a positioning signal to the movable access point, the position information such as the position change, the moving speed and the like of the movable access point is determined according to the feedback signal, the base station and the movable access point carry out bidirectional alignment and tracking on the light beam based on the position information, and a bidirectional wireless laser link is established between the base station and the movable access point;
s3, after the wireless laser communication link between the base station and each movable access point is established, the movable access point processes the received optical signal and converts it into single or multiple radio frequency signals, and sends them to each terminal user, the movable access point can adjust the shape of the radio frequency wave beam according to the number and position of the terminal users, to realize wave beam forming and space division multiplexing;
and S4, in an uplink, the terminal user sends a radio frequency signal to the movable access point, and the movable access point forwards the uplink signal to the base station through a wireless laser communication link between the movable access point and the base station to realize signal communication.
Compared with the prior art: the invention combines the advantages of high speed, large bandwidth and mobility support of wireless laser communication with the flexibility of radio frequency wireless access, so that the position of a movable access point in an optical carrier radio frequency system can be dynamically adjusted, thereby further expanding the coverage area of the system and improving the flexibility of the system; compared with the traditional radio frequency over optical system, the system of the invention is more suitable for fast fading channels and mobile users, and the performance and flexibility of the system are greatly improved. The method is characterized by comprising the following points:
1. in the system, the movable access point can be in a moving state, and can move to a region with dense users according to the change of the number and the positions of the users, thereby improving the flexibility and the efficiency of resource allocation.
2. One base station in the system can support a plurality of movable access points at different positions, while the traditional radio frequency over optical carrier system has no obvious benefit of a plurality of transmitters because the positions of the radio frequency transmitters are fixed and adjacent.
3. In the invention, the uplink signal transmitted by the terminal user does not need to be sent to the base station, but can be forwarded through any movable access point, thereby reducing pilot pollution and crosstalk between the uplink signals.
4. The complexity of the whole system is low, and the base station and the movable access point are easy to realize in the prior art.
Drawings
FIG. 1 is a block diagram of an RF signal dynamic coverage system using wireless laser communication as a carrier according to the present invention;
FIG. 2 is a block diagram of a base station in the system of the present invention;
FIG. 3 is a block diagram of a mobile access point in the system of the present invention;
FIG. 4 is a block diagram of an end user configuration in the system of the present invention;
FIG. 5 is a schematic diagram of an application scenario of the dynamic coverage method of radio frequency signals using wireless laser communication as a carrier according to the present invention;
fig. 6 is a flowchart illustrating steps of a method for dynamically covering an rf signal using wireless laser communication as a carrier according to the present invention.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.
Example 1
A radio frequency signal dynamic coverage system using wireless laser communication as a carrier, which at least comprises a base station, a mobile access point and a terminal user, as shown in fig. 1, the base station modulates a radio frequency signal on a wireless laser signal and sends the radio frequency signal to one or more mobile access points, and the mobile access points can move freely within a certain range; after receiving the wireless laser signal, the movable access point converts the wireless laser signal into a wireless radio frequency signal and sends the wireless radio frequency signal to a terminal user; the base station and the movable access point are respectively provided with a positioning and tracking subsystem for aligning and tracking wireless laser signals to realize bidirectional wireless laser communication; the movable access point can dynamically adjust the position of the movable access point and the output radio frequency wave beam according to the number and the position of the terminal users, so that the dynamic coverage of the radio frequency signals in the free space is realized.
A block diagram of the base station is shown in fig. 2. The base station consists of a positioning and tracking subsystem, an optical communication subsystem and an uplink communication subsystem, and the two subsystems work in parallel; the positioning and tracking subsystem consists of a positioning signal transmitter, a light beam deflection module, a positioning signal processing module and a feedback signal receiver; the positioning signal transmitter is responsible for generating and transmitting a positioning signal and is connected with the light beam deflection module and the positioning signal processing module; the light beam deflection module is responsible for deflecting light beams and is connected with the positioning signal processing module and a laser source in the optical communication subsystem; the positioning signal processing module is responsible for carrying out signal processing on the positioning signal and the received feedback signal, sending control information to the light beam deflection module according to the position information, and connecting the light beam deflection module with the positioning signal transmitter and the feedback signal receiver; the feedback signal receiver is responsible for receiving the feedback signal and is connected with the positioning signal processing module. The optical communication subsystem consists of a laser source and an optical signal processing module, wherein the laser source is responsible for emitting wireless laser signals and is connected with the optical signal processing module and a light beam deflection module in the positioning and tracking subsystem; the optical signal processing module is used for processing the optical signal and is connected with the laser source and the gateway. The uplink communication subsystem consists of an uplink signal receiver and an uplink signal processing module; the uplink signal receiver is responsible for receiving an uplink signal from a terminal user and is connected with the uplink signal processing module; the uplink signal processing module is responsible for carrying out signal processing on the uplink signal and is connected with the uplink signal receiver and the gateway.
A block diagram of the structure of the mobile access point is shown in fig. 3. The movable access point consists of a positioning and tracking subsystem, a downlink communication subsystem and an uplink communication subsystem. The positioning and tracking subsystem consists of a positioning signal receiver, a positioning signal processing module and a feedback signal transmitter; the positioning signal receiver is responsible for receiving the positioning signal from the base station and is connected with the positioning signal processing module; the positioning signal processing module is responsible for processing the positioning signal and generating a feedback signal, and is also responsible for controlling the alignment between the uplink signal and the base station by utilizing the position information in the positioning signal. The positioning signal processing module is connected with the positioning signal receiver, the feedback signal transmitter and an uplink signal processing module in the uplink communication subsystem; the feedback signal transmitter is responsible for transmitting a feedback signal to the base station and is connected with the positioning signal processing module. The uplink communication subsystem consists of an uplink signal processing module and an uplink communication transmitter; the uplink signal processing module is responsible for processing the uplink signal and is connected with a positioning signal processing module and an uplink communication transmitter in the positioning and tracking subsystem; the uplink communication transmitter is responsible for transmitting uplink signals and is connected with the uplink signal processing module. The downlink communication subsystem consists of an optical receiver, a downlink signal processing module, an optical-radio frequency conversion module and a radio frequency transmitter; the optical receiver is responsible for receiving optical signals from the base station and is connected with the downlink signal processing module; the downlink signal processing module is responsible for carrying out information processing such as modulation and coding on the optical signal and the radio frequency signal and is connected with the optical receiver and the optical-radio frequency conversion module; the optical-radio frequency conversion module is responsible for converting optical signals into single or multiple radio frequency signals and is connected with the downlink signal processing module and the radio frequency transmitter; the radio frequency transmitter is responsible for transmitting radio frequency signals to the terminal user and is connected with the optical-radio frequency conversion module.
A block diagram of the end user is shown in fig. 4. The terminal user consists of a radio frequency receiver, a terminal signal processing module and an uplink communication transmitter; the radio frequency receiver is responsible for receiving a radio frequency signal from the movable access point in a downlink, and is connected with the terminal signal processing module; the terminal signal processing module is responsible for processing the received radio frequency signal and generating a signal to be sent to the base station, and is connected with the radio frequency receiver and the uplink communication transmitter; the uplink communication transmitter is responsible for transmitting uplink signals and is connected with the terminal signal processing module.
The system is free from the constraint of the traditional optical fiber communication, the radio frequency coverage area can be dynamically adjusted, the advantages of high speed, large bandwidth and mobility support of wireless laser communication and the flexibility of radio frequency wireless access are combined, the coverage range of the system is expanded, the flexibility of the system is improved, the benefits of multiple transmitters are obvious, the complexity of the system is low, a base station and a movable access point are easy to realize in the prior art, and the system is more suitable for actual requirements.
Example 2
An application scenario diagram of a dynamic coverage method of radio frequency signals with wireless laser communication as a carrier is shown in fig. 5, and specifically includes the following steps:
and step S1, the base station broadcasts a positioning signal to the free space, the movable access point sends a feedback signal to the base station along the incoming wave direction after receiving the positioning signal, and the base station determines the position of the movable access point and the current state of each access point according to the received feedback signal.
And step S2, the base station modulates the radio frequency signal on the signal through the optical signal processing module, and transmits the signal to the movable access point in the working state through the laser source, meanwhile, the base station continuously transmits the positioning signal to the movable access point, determines the position information such as the position change, the moving speed and the like of the movable access point according to the feedback signal, and carries out bidirectional alignment and tracking on the light beam by the base station and the movable access point based on the position information, thereby establishing a bidirectional wireless laser link between the base station and the movable access point.
There are two main modulation modes for modulating the radio frequency signal into the signal, i.e. analog signal modulation and digital signal modulation. The analog signal modulation is to modulate a radio frequency carrier wave onto an optical signal through a Mach modulator; the digital signal modulation needs to demodulate and decode the radio frequency first, extract the digital signal, and then modulate and encode the light according to the digital signal. Both modulation schemes are suitable for use in the system of the present invention.
Step S3, after the wireless laser communication link between the base station and each mobile access point is established, the mobile access point processes the received optical signal and converts it into a single or multiple radio frequency signals, and sends them to each terminal user, and the mobile access point can adjust the shape of the radio frequency beam according to the number and position of the terminal users, so as to implement beam forming and space division multiplexing.
Wherein a single mobile access point may serve one or more end users. When serving multiple end users, the mobile access point may generate multiple beams of radio frequency in different directions by beamforming to achieve spatial multiplexing between different users. Meanwhile, the mobile access point can also adopt the traditional multiplexing mode, namely time division multiplexing, frequency division multiplexing, code division multiplexing and the like, so as to support multiple users.
In the uplink, the end user sends a radio frequency signal to the mobile access point, step S4. The mobile access point forwards the uplink signal to the base station through a wireless laser communication link with the base station.
The system enables the movable access point in the radio-frequency over optical system to dynamically adjust the position, thereby further expanding the coverage area of the system and improving the flexibility of the system.
It should be noted that the above-mentioned contents only illustrate the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and it is obvious to those skilled in the art that several modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations fall within the protection scope of the claims of the present invention.
Claims (10)
1. Radio frequency signal dynamic coverage system with wireless laser communication as carrier, its characterized in that: including at least base stations, mobile access points and end users,
a base station modulates a radio frequency signal on a wireless laser signal and sends the wireless laser signal to one or more movable access points, and the movable access points can move freely within a certain range;
after receiving the wireless laser signal, the movable access point converts the wireless laser signal into a wireless radio frequency signal and sends the wireless radio frequency signal to a terminal user;
the base station and the movable access point are respectively provided with a positioning and tracking subsystem, and the positioning and tracking subsystems comprise a positioning signal transmitter, a light beam deflection module, a positioning signal processing module, a feedback signal receiver, a positioning signal processing module and a feedback signal transmitter, so that bidirectional wireless laser communication is realized; the movable access point can dynamically adjust the position of the movable access point and the output radio frequency wave beam according to the number and the position of the terminal users, and dynamic coverage of radio frequency signals is achieved.
2. The radio frequency signal dynamic coverage system with wireless laser communication as a carrier of claim 1, wherein: the base station comprises a positioning and tracking subsystem, an optical communication subsystem and an uplink communication subsystem, and the three subsystems work in parallel; wherein the content of the first and second substances,
a positioning signal transmitter in the positioning and tracking subsystem is responsible for generating and transmitting a positioning signal and is connected with the light beam deflection module and the positioning signal processing module;
the light beam deflection module is responsible for deflecting light beams and is connected with the positioning signal processing module and a laser source in the optical communication subsystem;
the positioning signal processing module is responsible for carrying out signal processing on a positioning signal and a received feedback signal, sending control information to the light beam deflection module according to the position information, and connecting the light beam deflection module with the positioning signal transmitter and the feedback signal receiver;
the feedback signal receiver is responsible for receiving feedback signals and is connected with the positioning signal processing module.
3. The radio frequency signal dynamic coverage system with wireless laser communication as a carrier of claim 2, wherein: the optical communication subsystem consists of a laser source and an optical signal processing module, wherein the laser source is responsible for transmitting wireless laser signals and is connected with the optical signal processing module and a light beam deflection module in the positioning and tracking subsystem; and the optical signal processing module is responsible for carrying out signal processing on the optical signal and is connected with the laser source and the gateway.
4. The radio frequency signal dynamic coverage system with wireless laser communication as a carrier of claim 3, wherein: the uplink communication subsystem consists of an uplink signal receiver and an uplink signal processing module, wherein the uplink signal receiver is responsible for receiving uplink signals from terminal users and is connected with the uplink signal processing module; the uplink signal processing module is responsible for carrying out signal processing on the uplink signal and is connected with the uplink signal receiver and the gateway.
5. The radio frequency signal dynamic coverage system with wireless laser communication as carrier of claim 1 or 2 or 3 or 4, characterized in that: the movable access point consists of a positioning and tracking subsystem, a downlink communication subsystem and an uplink communication subsystem; wherein the content of the first and second substances,
a positioning signal receiver in the positioning and tracking subsystem is responsible for receiving a positioning signal from a base station and is connected with a positioning signal processing module;
the positioning signal processing module is responsible for processing the positioning signal and generating a feedback signal, and is also responsible for controlling the alignment between the uplink signal and the base station by utilizing the position information in the positioning signal; the positioning signal processing module is connected with the positioning signal receiver, the feedback signal transmitter and an uplink signal processing module in the uplink communication subsystem;
the feedback signal transmitter is responsible for transmitting a feedback signal to the base station and is connected with the positioning signal processing module.
6. The radio frequency signal dynamic coverage system with wireless laser communication as a carrier of claim 5, wherein: the downlink communication subsystem consists of an optical receiver, a downlink signal processing module, an optical-radio frequency conversion module and a radio frequency transmitter; wherein the content of the first and second substances,
the optical receiver is responsible for receiving optical signals from the base station and is connected with the downlink signal processing module;
the downlink signal processing module is responsible for modulating the optical signals and the radio frequency signals and processing coded information and is connected with the optical receiver and the optical-radio frequency conversion module;
the optical-radio frequency conversion module is responsible for converting optical signals into single or multiple radio frequency signals and is connected with the downlink signal processing module and the radio frequency transmitter;
the radio frequency transmitter is responsible for transmitting radio frequency signals to an end user and is connected with the optical-radio frequency conversion module.
7. The radio frequency signal dynamic coverage system with wireless laser communication as carrier of claim 6, characterized by: the terminal user consists of a radio frequency receiver, a terminal signal processing module and an uplink communication transmitter; wherein the content of the first and second substances,
the radio frequency receiver is responsible for receiving a radio frequency signal from the movable access point in a downlink, and is connected with the terminal signal processing module;
the terminal signal processing module is responsible for processing the received radio frequency signal and generating a signal to be sent to the base station, and is connected with the radio frequency receiver and the uplink communication transmitter;
the uplink communication transmitter is responsible for transmitting uplink signals and is connected with the terminal signal processing module.
8. The radio frequency signal dynamic coverage system with wireless laser communication as a carrier of claim 7, wherein: there is a radio frequency or optical link between the base station and the end user, and the system can work in parallel on the basis of the existing communication system.
9. A radio frequency signal dynamic coverage method applied to the radio frequency signal dynamic coverage system using wireless laser communication as a carrier in claim 8, comprising the following steps:
s1, the base station broadcasts a positioning signal to the free space, the movable access point sends a feedback signal to the base station along the incoming wave direction after receiving the positioning signal, and the base station determines the position of the movable access point and the current state of each access point according to the received feedback signal;
s2, the base station modulates the radio frequency signal on the signal through the optical signal processing module and transmits the signal to the movable access point in the working state through the laser source; meanwhile, the base station continuously transmits a positioning signal to the movable access point, the position change and the moving speed position information of the movable access point are determined according to the feedback signal, the base station and the movable access point perform bidirectional alignment and tracking on the light beam based on the position information, and a bidirectional wireless laser link is established between the base station and the movable access point;
s3, after the wireless laser communication link between the base station and each movable access point is established, the movable access point processes the received optical signal and converts it into single or multiple radio frequency signals, and sends them to each terminal user, the movable access point can adjust the shape of the radio frequency wave beam according to the number and position of the terminal users, to realize wave beam forming and space division multiplexing;
s4, in the uplink, the terminal user sends the radio frequency signal to the movable access point, the movable access point transmits the uplink signal to the base station through the wireless laser communication link between the movable access point and the base station, and signal communication is realized.
10. The method for dynamically covering radio frequency signals according to claim 9, wherein: in step S2, the radio frequency signal is modulated on the signal by two ways, i.e., analog signal modulation or digital signal modulation, where the analog signal modulation externally modulates the radio frequency carrier onto the optical signal by a mach modulator; the digital signal modulation is to demodulate and decode the radio frequency to extract a digital signal, and then modulate and encode the light according to the digital signal.
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| CN202210426552.3A CN114531200B (en) | 2022-04-22 | 2022-04-22 | Radio frequency signal dynamic coverage system and method using wireless laser communication as carrier |
| PCT/CN2022/143412 WO2023202154A1 (en) | 2022-04-22 | 2022-12-29 | Radio frequency signal dynamic coverage system and method using wireless laser communication as carrier |
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| CN202210426552.3A CN114531200B (en) | 2022-04-22 | 2022-04-22 | Radio frequency signal dynamic coverage system and method using wireless laser communication as carrier |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427903A (en) * | 2013-08-14 | 2013-12-04 | 东南大学 | Visible light communication system based on wireless access point |
| CN108494483A (en) * | 2018-03-20 | 2018-09-04 | 东南大学 | A kind of highway light wireless communication method |
| CN111630936A (en) * | 2017-12-30 | 2020-09-04 | 英特尔公司 | Method and apparatus for wireless communication |
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| CN1545225A (en) * | 2003-11-11 | 2004-11-10 | 武汉虹信通信技术有限责任公司 | Free space optical transmission mobile communication direct amplifying station |
| CN106712851B (en) * | 2016-12-08 | 2020-03-10 | 武汉虹信通信技术有限责任公司 | Distributed wireless signal coverage system |
| CN113572525B (en) * | 2020-04-28 | 2022-11-04 | 华为技术有限公司 | Communication method and system |
| CN112804005B (en) * | 2021-04-08 | 2021-09-17 | 网络通信与安全紫金山实验室 | Photon millimeter wave indoor coverage transmission method and system |
| CN114531200B (en) * | 2022-04-22 | 2022-07-12 | 东南大学 | Radio frequency signal dynamic coverage system and method using wireless laser communication as carrier |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427903A (en) * | 2013-08-14 | 2013-12-04 | 东南大学 | Visible light communication system based on wireless access point |
| CN111630936A (en) * | 2017-12-30 | 2020-09-04 | 英特尔公司 | Method and apparatus for wireless communication |
| CN108494483A (en) * | 2018-03-20 | 2018-09-04 | 东南大学 | A kind of highway light wireless communication method |
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